Hi,
saying "No"to others is an issue for many people. But most people don't even realize it.I really appreciate that you have your own realization. Now it's easy to change that habit with little practice.
Next Steps
Living the life which you really want without trying to please others will give you the real empowerment to say No to others.
Health Tips
Giving a pause (take little time) before saying yes to someone is a simple technique you can start practising.
One or two sessions of Hypnotherapy which can be offered through Skype will also be helpful to access your inner strength to implement change permanently.
Hope this suggestion will help to take further steps. 👍